Designed for people who work or play in the cold for long hours, odorless, disposable HotHands-2 hand warmers are air-activated and will provide up to 10 hours of soothing warmth inside gloves, pockets or wherever you feel a chill. Nontoxic, nonflammable, environmentally friendly and ready to use. 3-1/4"L x 3-1/2"W. Pair.